Abrading-roll for leather-dressing machines.



U. F. FIIX.

.ABR'ADING ROLL FOR LEATHER DRESSING MACHINES.

v APPLICATION FILED DEC. S, 1915.

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. nBnaDING-non: non LEATHER-Denssine MACHINES.

Speciication of Letters Patent. i Patented @0117'. lll-916 v npeneanon mea :December s, 1,915. serial ira'caaoo,

Beit known that' I, O'rfro F. Fnix, a citi- 4zen of the United States,y residing at West flIoboken, in the county ofI-Iudson .and State of"New`Jersey, have invented a new and useful Abrading-Roll 4for Leather-Dressing Machines, of which the following is a specishown in Patent No. 636,970, granted to me fication.

This invention has reference to abrading rolls for leather dressing machines, and its object is toprovide an abrading'roll for the purpose which' may be readily' restored to active condition when dull', and 'which isA free from certain objectionsl to rolls for a like purpose as heretofore used.

In leather' dressing machines such asv on November 14, 1899, it has been customary .l to provide anabrading .cylinder with a cov 20.

ering of paper carrying abrading'material l held' thereto byfglue;

with lthe .adherent In the practical operation ofthe machine it has heretofore been necessary,.when the abrading surfaceis dull, to take the hardened glue vandemery fromthe' paper wheel while the wheel is in fullrotation, then stop the machine, spread hot. glue over the surfaceof the wheel and then-apply elnery to it, necessitating a further wait until the glue emery is perfectly dry.

This is, of course, a time consuming pro- ,cedure With. the present lnventlon an abrading roll ondrum is made of carborundum or `other suitablematerial L.of like `nature, carborundurn beingpreferred,4 the drum consisting of a cylindrical base or carrier with carborundum cylinders `munted thereon, Such an abrading devicehas theadvantage of always being in condition, forshould the surface becomefilled with particles of flesh from the hides'being'treated, all `that is necessary. is to brush the surface 'oft' with vwarm water and occasionally to true up the cylindery with a suitable dresser, such v work requiring'at 'the most but a few`minutes.

rIhe invention will be best understood 'froma consideration of the'following detailed description, taken in connection with the accompanying drawings forming partof'this specification, with the further understanding that while the drawings show a r practical Vform of the invention the latter .ijs

not confined to any strict conformity with i "the showing `of the drawings, butl may be changed and m'oded so long as such of. v Fig.

changes and modifications come within the scope of the appended claims.

In' the drawings ,Figure l` is a plan View lof an abrading roll or' drum'constructedl in y accordance .with the present invention. "Fig.

2 is a longitudinal diametric section there,

in Fig'. 4 a single cylinder .2?, instead of. a

'series of pulleys, is employed.

`Mounted o n the carrier 2 or`2a are cylinders 3, 4, respectively, of suitable thickness of wall `and formed of ca'rborundum` orl other similar abrading material, carborundum being preferred. lThe end cylinders 3 each have one end 5 practically radial to the' axis of rotation and provided with a l circumferential groove 6 entered-,by an anfnular vflange 7 on the peripheral portion of a head `8. The other, edge of each cylinder is beveled as shown at 9, so thatsuch. edge 1s in a plane cutting the axis of rotation at" an angle `of a few degrees, say, five or ten degrees, since any particular inclination n'ot materlal. The cylinder 4 has both ends beveled similarly to the ends 9 of the cylini y ders 3. If the drumbe short', buttwo cylinders 3 need be employed. If the drum be longer then an additional cylinder 4 is used. In the particular showing oft-he'drawings the` drum may be assumed to be twelve inches thick` and forty inches long between the heads 8, the latter being held together io'o by through bolts 10, which 'serve to clamp the abrading sections of thedrum firmly together, since it Willbe understood that the carrier 'for the abradingcylinders is madel fastlto the shaft l -so as to rotatel therewith'.l

In practice the carborundum cylinders 3 and 4 are made' thick enough to withstand aP speed of rotation of 900 or more revolutions per minute, and to admit of successive dreasings.

The meeting ends of thecylinders'are bev.-

eled to bein a plane cutting the axis ofrotation at a small angle, so'that the' skin being treated is not engaged at the joints bey"-ably less than the diameter of the abrading cylinders 3 and 4C, so that they do not reach to the outer surfaceof the abrading roll or drum,` wherefore the abrading drum is of long life and may be subjected to the action of a dressing tool from time to time. The heads may be so related to the thickness of the cylinders of abrading material that the latter may be dressed down to about the diameter of thel heads and still be strong enough to admit of a speed of rotation as high as 900 revolutions per minute. The abrading drum is of even diameter throughout, but may be as long or as thick as may be desired.

The relatively thick shells of practically solid carborundum as compared with sandpaper or surfaces of emery or other abrading material inpowdered form glued to a carrier, have the advantage over such glued powdered material in that the surface of the carborundum drum does not become overcharged with fatty material removed from the fleshy side of the skins or heads and may be cleansed from time to time by the use of warm water.

A very fine velvet-like face may be pro- ,duced on the fleshy part of the skin to be abraded by brushing a mixture of albumen, water and pumice stone on the fleshy face of the skin and then-rolling it up and allowing it ,to season before subjecting it to the action of the abrading drum. If the skins are tanned too rich, that is, if they are greasy, the powdered pumice stone is spread on the fleshy side of the skin without using the mixture of water With albumen.

What is claimed is 1. An abrading roll for leather dressing machines, comprising a cylindrical carrier adapted to'be .mounted on a shaft', a series of shells of abrasive material strung on 'the cylindrical carrier, and means for clamping the shells in end abutment.

2. An abrading` roll for leather dressing machines comprising a cylindrical carrier adapted to be mounted on a shaft, a series of shells of abrasive material strung on the cylindrical carrier, heads engaging the'terminal ends of the series of shells for holding them on the carrier in end abutment, and bolts traversing the heads and the cylindrical carrier for holding the heads in the clamping position.

3. An abrading roll for leather dressing machines comprising a cylindrical carrier adapted to be mounted on a shaft and consisting of a seriesof cylindrical members in end abutment, a series of cylindrical shells of abrasive material mounted on the cylindrical carrier in end abutment, heads engaging the terminal ends of the series of shells and the terminal ends of the series of cylindrical carrier members, and bolts traversing the heads and the carrier for clamping the shells and carrier elements together.v

el. An abrading roll for leather dressing machines, comprising a supporting core, a series of abutting shells of abrasive material mounted on the core with the abutting ends correspondingly beveled in planes cutting the axis of the roll at an angle, said series of shells having the terminal ends in planes substantially perpendicular to the axis of the roll with said terminal ends provided with annular grooves, and clamping heads with annular flanges applied to the ends of the series with the flanges entering the grooves, the heads being of less external diameter than the external diameter -of the shells` l In testimony, that' claim the foregoing as my own, I have hereto aiiixed my signa ture in the presence of two witnesses.

OTTO FELIX FEIX. 

